export declare const SDK_STATE_VERSION = 1;
export declare const SESSION_INDEX_SNAPSHOT_VERSION = 3;
export declare class UnsupportedStateVersionError extends Error {
    readonly file: string;
    readonly version: number;
    readonly maximumSupportedVersion: number;
    readonly code = "unsupported_state_version";
    constructor(file: string, version: number, maximumSupportedVersion?: number);
}
export declare function assertSupportedStateVersion(file: string, value: unknown): void;
export declare function assertSupportedSnapshotVersion(file: string, value: unknown): void;